A Strategy for Patterning Conducting Polymers Using Nanoimprint Lithography and Isotropic Plasma Etching

Huang, Chunyu; Dong, Bin; Lü, Nan; Yang, Bingjie; Gao, Liguo; Tian, Liang; Qi, Dianpeng; Wu, Qiong; Chi, Lifeng

doi:10.1002/smll.200801197

Cited by 47 publications

(42 citation statements)

References 38 publications

(36 reference statements)

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“…Recently, topographically modified electroactive surfaces have been introduced as a cell culturing platform to support growth of excitable tissue cells. There are a number of available patterning methods such as CFL, 52 NIL 49 or lift-off 25 for patterning conducting polymers. Since most of the conducting polymers are rigid (elastic modulus; PANi: 2–4 GPa, 32 PPy: 1.2–3.7 GPa, 113 PEDOT: 1.1–2.2 GPa 79 ) they can form tens of nanometer scale features with high fidelity.…”

Section: Synthetic Polymers and Their Properties/uses In Patterning Mmentioning

confidence: 99%

Patterning Methods for Polymers in Cell and Tissue Engineering

et al. 2012

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Polymers provide a versatile platform for mimicking various aspects of physiological extracellular matrix properties such as chemical composition, rigidity, and topography for use in cell and tissue engineering applications. In this review, we provide a brief overview of patterning methods of various polymers with a particular focus on biocompatibility and processability. The materials highlighted here are widely used polymers including thermally curable polydimethyl siloxane, ultraviolet-curable polyurethane acrylate and polyethylene glycol, thermo-sensitive poly(N-isopropylacrylamide) and thermoplastic and conductive polymers. We also discuss how micro- and nanofabricated polymeric substrates of tunable elastic modulus can be used to engineer cell and tissue structure and function. Such synergistic effect of topography and rigidity of polymers may be able to contribute to constructing more physiologically relevant microenvironment.

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Section: Synthetic Polymers and Their Properties/uses In Patterning Mmentioning

confidence: 99%

Patterning Methods for Polymers in Cell and Tissue Engineering

et al. 2012

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“…The patterning of the polymer film is then done by a traditional sacrificial lithography technique, which does not require any etching steps, and is therefore also more cost effective. The experimental details for the formation of a PAni or PPy layer are slightly different since different conditions yield lead to better results for each of these materials (in terms of polymerization time and film thickness) [31], according to the following procedure: For the formation of a PAni layer, the polymerizing solution consisted of a combination of the monomer, aniline (Sigma-Aldrich, St. Louis, MO, USA), and ammonium persulfate (APS) (ICN Biomedicals, Inc., Aurora, OH, USA), an oxidizing agent needed for the chemical oxidative synthesis. A 10 mL solution containing APS (40 mM) in 1 M HCl (Sigma-Aldrich) was prepared.…”

Section: Fabricationmentioning

confidence: 99%

“…Shaping these materials into functional components remains a challenge because of their high melting points and very low solubility in common solvents. A novel patterning technique combining a chemical oxidative synthesis of the polymers with standard silicon fabrication technology has recently been developed [31]. …”

Section: Introductionmentioning

confidence: 99%

Conducting Polymer 3D Microelectrodes

Sasso

Vázquez

Vedarethinam

et al. 2010

Sensors

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Conducting polymer 3D microelectrodes have been fabricated for possible future neurological applications. A combination of micro-fabrication techniques and chemical polymerization methods has been used to create pillar electrodes in polyaniline and polypyrrole. The thin polymer films obtained showed uniformity and good adhesion to both horizontal and vertical surfaces. Electrodes in combination with metal/conducting polymer materials have been characterized by cyclic voltammetry and the presence of the conducting polymer film has shown to increase the electrochemical activity when compared with electrodes coated with only metal. An electrochemical characterization of gold/polypyrrole electrodes showed exceptional electrochemical behavior and activity. PC12 cells were finally cultured on the investigated materials as a preliminary biocompatibility assessment. These results show that the described electrodes are possibly suitable for future in-vitro neurological measurements.

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“…[16] It has also been shown that NIL can be used to pattern functional materials such as conducting polymers, [17] ferroelectric polymers, [18] proteins, [19] metallic and semiconducting nanoparticles (NPs), [20] carbon nanotube composites, [21] sol-gels, [22] chalcogenide glasses, [23] and bulk metallic glasses. [24] NPs can be generated with an enormous array of surface functionality.…”

Section: Introductionmentioning

confidence: 99%

Nanoimprinted Polyethyleneimine: A Multimodal Template for Nanoparticle Assembly and Immobilization

Subramani

Ofir

Patra

et al. 2009

Adv Funct Materials

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Polyethyleneimine (PEI) is used as a scaffold for integrated top‐down/bottom‐up fabrication. In this synergistic strategy, patterned PEI surfaces are created using thermal nanoimprint lithography (NIL) using a sacrificial polystyrene (PS) overlayer. These imprinted surfaces act as versatile templates for assembling nanoparticles and dyes, with the amine groups of the PEI enabling electrostatic assembly, carbodiimide coupling, and dithiocarbamate attachment to the nanoimprinted features. The efficient assembly of particles and dyes is confirmed through fluorescence and atomic force microscopy. In these studies the PS overlayer serves two roles. First, the PS layer protects the PEI surface during the plasma‐etch removal of the residual layer of the NIL process. Second, the PS overlayer serves as a mask, enabling sequential functionalization of the sides and the tops of the PEI features.

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A Strategy for Patterning Conducting Polymers Using Nanoimprint Lithography and Isotropic Plasma Etching

Abstract: Figure 5. SEM images of SNPs adsorbed onto the PANI dots (a) and lines (b). Scale bar ¼ 1 mm. Scale bar of the insets ¼ 500 nm.

Cited by 47 publications

References 38 publications

Patterning Methods for Polymers in Cell and Tissue Engineering

Patterning Methods for Polymers in Cell and Tissue Engineering

Conducting Polymer 3D Microelectrodes

Nanoimprinted Polyethyleneimine: A Multimodal Template for Nanoparticle Assembly and Immobilization

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